Patents by Inventor Kaj Hjelm

Kaj Hjelm has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Height adjustable piece of furniture with zero stand-by power consumption
    Patent number: 9084475
    Abstract: The present invention relates to a height adjustable piece of furniture comprising at least one extendable column, an electric motor adapted for driving the extendable column, at least one switch for operation control of the electric motor, and a power control unit adapted to control the power distribution to the height adjustable piece of furniture, and wherein the power control unit is connected to a power source. The connection between the power source and the height adjustable piece of furniture is provided via the switch, and the switch is in an activated state adapted to connect the power source to the height adjustable piece of furniture, and in a deactivated state adapted to disconnect the power source from the height adjustable piece of furniture. The present invention further relates to a power control unit for control of power distribution to a height adjustable piece of furniture.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: July 21, 2015
    Assignee: KIH-UTVECKLING AB
    Inventor: Kaj Hjelm